Oops. I don't know what to swap for glint hawks, probably -4 nets, +4 hawks, -4 unsummons +4 arrests (since you might be going white anyways?) Then just add some blue white lands.
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I don't like 4x mox opal due to the legendary rule. However, they are prime targets for removal, so maybe reduce it to 2x (can be tutored with the mage). I would recommend chimeric mass. They add extra firepower, but are essentially 0 cost artifacts when it comes to the smith. -2 mox, -2 accorder's shield, +4 mass. Also, spidersilk net is cool for reach, but your embersmith is already taking care of the flyers. I would minus them and add in glint hawks. They give you card advantage by bringing back a 0 cost to your hand to add firepower. It's like having an artifact to fire away with, but you get a body on the board for beats. I think they are better than unsummons. -3 unsummons, +3 glint hawks. Since basilisk collar is the bread and butter of your deck, I would reccommend adding at least one more. They are going to be trying to blow that sucker up ASAP, and once they do you will lose your advantage. You can still tutor the second one up and be prepared for the inevitable. Finally, it would need some tuning, but I would swap Jace Beleren for some of your card advantage spells. He doesn't scry, but if you're planning on playing FNM having a Jace in hand just to kill off other JTMSs is fairly valuable. -1 preordain, -2 see beyond, +3 JBs. That's my opinion, but I like the deck overall. I had the same Idea, and came across your deck through a google search. Cool stuff.